A185776 Number of (n+1)X7 0..2 arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum

1296000, 190416934, 27239862108, 4212755548948, 641850855452998

Offset

1,1

Comments

Column 6 of A185777

Links

Table of n, a(n) for n=1..5.

Example

Some solutions for 3X7
..0..0..1..2..0..2..2....0..0..1..1..2..1..0....0..0..1..0..2..1..2
..0..1..0..0..0..2..2....0..2..0..2..2..0..0....0..0..0..2..1..2..0
..0..1..1..1..0..0..2....0..1..1..2..2..0..2....0..1..1..1..2..2..2

Crossrefs

Sequence in context: A244563 A163681 A354560 * A345083 A345084 A262531

Adjacent sequences: A185773 A185774 A185775 * A185777 A185778 A185779

Keyword

nonn

Author

R. H. Hardin Feb 03 2011

Status

approved